Brown and Bennett - Wapanucka - 1910+

Hello. I am looking for any info on the Brown family that lived in Wapanucka around 1910 and later. The info I have and know to be correct is that my grandmother, Dora Kathryn Brown, was born in Wapanucka in 1913. The info I have collected through Latter Day Saints is that her father was Will Brown and mother was Etta Elizabeth Bennett, and that they were married about 1912. Also, that my grandma's b-day is July 3, 1913. From stories my mother remembers as a child, this family is at least part choctaw and possibly chickasaw. I have requested my granny's b-certificate, but Okl city has no record of her. The chickasaw center has no record of Will and Etta's marriage. Now I am stuck! Any help would be most appreciated. I have not been able to look at the 1920 Ok census for Johnston County yet, as I cannot find a place where I live that has it. Thanks, Beth